We incorrectly skipped setting the port status of meta-servers
to 'neutral' when resetting service. When working offline and
network was up again, the service resolution with these servers
failed due to 'not-working' port status (because they were really
not working during offline mode) and the normal (online) behaviour
was a bit delayed.
https://fedorahosted.org/sssd/ticket/1933
Thanks
Michal